FIELD: electrical engineering.
SUBSTANCE: proposed transformer set has three-phase traction transformer incorporating three-leg magnetic core, primary winding connected to power circuit, and secondary winding built of two phase windings disposed on extreme legs of three-leg magnetic core; finishing leads of these windings are designed for connection to contact system; in addition it has two voltage boost windings, each being disposed on intermediate leg of three-led magnetic core and connected through one lead to traction rail and through other one, to starting lead of one of secondary winding phases disposed on one of extreme legs of three-leg magnetic core. Each of voltage boost windings is proposed to be provided with voltage regulator. Provision is made for joint or separate voltage regulation for each of two contact-system sections.
EFFECT: reduced current and power loss in contact system due to raising voltage across contact system at constant input power of locomotive, improved balancing of supply mains phase currents.
1 cl, 5 dwg
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